Hi Bart

On 08/04/2018 08:03 AM, Bart Van Assche wrote:

Instead of allowing requests that are not power management requests
to enter the queue in runtime suspended status (RPM_SUSPENDED), make
the blk_get_request() caller block. 

Who will resume the runtime suspended device ?

In original blk-legacy, when a request is added, blk_pm_add_request will call
pm_request_resume could do that. The request will be issued after the q is resumed
successfully.

After this patch, non-pm request will be blocked and pm_request_resume is removed from
blk_pm_add_request, who does resume the runtime suspended q and device ?

Thanks
Jianchao